GB2218129A - Fire expansion joint for ceiling runner. - Google Patents
Fire expansion joint for ceiling runner. Download PDFInfo
- Publication number
- GB2218129A GB2218129A GB8909633A GB8909633A GB2218129A GB 2218129 A GB2218129 A GB 2218129A GB 8909633 A GB8909633 A GB 8909633A GB 8909633 A GB8909633 A GB 8909633A GB 2218129 A GB2218129 A GB 2218129A
- Authority
- GB
- United Kingdom
- Prior art keywords
- runner
- web
- opening
- vertical web
- expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/06—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members
- E04B9/065—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members comprising supporting beams having a folded cross-section
- E04B9/067—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members comprising supporting beams having a folded cross-section with inverted T-shaped cross-section
- E04B9/068—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members comprising supporting beams having a folded cross-section with inverted T-shaped cross-section with double web
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/06—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members
- E04B9/08—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members having the capability of expansion, e.g. in case of fire
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S52/00—Static structures, e.g. buildings
- Y10S52/05—Designed for thermal distortion
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
Description
2218 129 "Fire expansion joint for ceiling runner" The invention relates
to a ceiling runner and, more particularly, to a ceiling runner with a fire expansion joint. 5 U.S. Patent No. 3,589,089 discloses a ceiling runner having two openings in the vertical web to absorb expansion of the ceiling runner. The openings permit the flanges of the ceiling runner to bend downwards, the enlarged bulb at the top of the ceiling runner to bend upwards, and the two pieces of metal forming the web of the ceiling runner to expand outwards to either side of the web of the ceiling runner.
The invention provides an expansion runner for a ceiling system, comprising a vertical web member with upper and lower edge portions, having an enlarged bulb at its upper edge portion and a horizontal flange extending from both sides of its lower edge portion; the runner having an upper elongate opening adjacent to the upper edge portion of the web and a lower elongate opening positioned in the vertical web between and intermediate to the upper and lower edge portion of the vertical web; the upper and lower openings having a length, taken along the length of the runner, selected to accommodate an expected axial expansion of the runner upon exposure to a fire; wherein the upper elongate opening extends from the upper edge portion of the web into the enlarged bulb, the upper elongate opening having upper and lower edges, the upper edge having only one triangular notch therein with the notch positioned at the midpoint of the upper edge and extending to almost the top of the enlarged bulb, and at each end of the upper edge a straight line cut with abutting edges that extends from the upper opening towards and to almost the top of the enlarged bulb; and having only positioned extendina the lower elongate opening having upper and lower margins, the upper margin being spaced from the lower edge of the upper elongate opening, the lower margin one triangular notch therein with the notch at the midpoint of the lower margin and to adjacent to the horizontal flange, and at each end of the lower margin a straight line cut with abutting edges extending from the lower opening towards and almost to the top of the horizontal flange.
The invention also provides an expansion runner for a ceiling system composed of a vertical web member with upper and lower ends. The vertical web member has an enlarged bulb at its upper end and horizontal flanges extending from both sides of its lower end. The runner has an upper elongate opening adjacent to the upper end of the web and the runner has a lower elongate opening positioned in the vertical web inter- mediate between the upper and lower ends of the vertical web. The upper and lower openings have length taken along the length of the runner to accommodate anticipated expansion of the runner upon r exposure to fire whereby the expansion joint of the runner absorbs the anticipated expansion of the runner.
The improvement herein involves the extending of the upper elongated opening from the upper end of the web into the enlarged bulb. The upper elongate opening has upper and lower edges and the upper edge has only one triangular notch cut therein with the notch posi tioned at the midpoint of the upper edge and the notch extends almost to the top of the enlarged bulb. At each end of the upper edge of the upper opening, a straight line cut with abutting edges extends from the upper opening towards and to almost the top of the enlarged bulb. The lower elongated opening has upper and lower margins and the upper margin is spaced from the lower edge of the upper elongated opening. The lower margin has only one triangular notch therein, with the notch positioned at the midpoint of the lower margin and extending to a point adjacent to the horizontal flange. At each end of the lower margin, a straight line cut with abutting edges extends from the lower opening towards and to almost the top of the horizontal flange.
The lower edge of the upper opening has a short straight line indentation at each end of the lower edge and the straight line indentations extend towards the lower opening.
A portion of the vertical web remains between the upper and lower openings and this portion of the vertical web is positioned above any ceiling board resting on the horizontal flange of the vertical web, whereby movement of the said portion of the web away from the plane of the web will not cause the said portion of the web to press on the-board or dislodge the board from the runner.
Finally, the enlarged bulb is thicker than the vertical web member and the lower edge of the upper opening has flared flanges that are part of the enlarged bulb which is cutaway to form the upper opening.
one form of ceiling runner with an expansion joint constructed in accordance with the invention will now be described by way of example only with reference to the accompanying drawings, in which:
is Figure 1 is a perspective view of the expansion joint; and Figure 2 is a perspective view similar to Figure 1, showing the expansion joint after expansion.
Referring to the accompanying drawings, one form of expansion runner indicated generally by the reference numeral 2 for a ceiling system is formed of a single piece of metal for its basic structure. The metal starts with a flange element 4 which bends at a 90 0 angle to form a web element 6. At the top of the web element 6, the sheet metal forming the runner bends into an enlarged open section 8, then into a second web element 10 placed side by side with the first web element 6, and finally into a second flange element 12 at a right angle to the web element 10, opposite the first web element 4. This forms an inverted T structure. A separate element 14 is then placed underneath the flange elements 4 and 12 and wrapped around the free edges of the flange elements 4 and 12 to hold the web elements 6 and 10 in an abutting relationship. There is thus formed a vertical web member 16 with an upper end 18 and a lower end 20. vertical web member has an enlarged bulb 22 at its upper end and a horizontal flange 24 extending from both sides of its lower end 20. The runner 2 has an upper elongate opening indicated generally by the reference number 26 adjacent to the upper end of the web and a lower elongate opening indicated generally by the reference number 28 positioned in the vertical web 16 between the upper end 18 and the lower end 20 of the vertical web. The upper and lower openings 26 and 28 have a length, taken along the length of the runner 2, selected to accommodate the expected axial expansion of the runner upon exposure to a fire. Figure 1 shows the runner structure before it has been subjected to expansion forces as a result of a fire and Figure 2 shows a similar runner structure that has been subjected to expansion forces as a result of a fire and in which the expansion forces are absorbed in the region of the two elongate openings. In that way, during the fire, the ends of the runner will not press against adjacent runners or the walls and enlarge the opening in the grid work and cause a ceiling board to drop out of the suspended ceiling.
The upper elongate opening 26 extends from the upper end 18 of the web 16 into the enlarged bulb 22.
The upper elongate opening has an upper edge 30 and a lower edge 32. The upper edge has only one triangular notch 34 therein with the notch positioned at the midpoint of the upper edge and extending to almost the top of the enlarged bulb. At each end of the upper edge, a straight line cut 36 with abutting edges extends from the upper opening towards and almost to the top of the enlarged bulb. The lower elongate opening 28 has an upper margin 38 and a lower margin 40. The upper margin 38 is spaced from the lower edge 32 of the upper elongate opening 26. The lower margin 40 has only one triangular notch 42 therein with the notch positioned at the midpoint of the lower margin and extending to a point adjacent to the horizontal flange 24. At each end of the lower margin 40, a straight line cut 44 with abutting edges extends from the lower opening towards, and almost to, the top of the horizontal flange 24.
The upper margin 38 of the lower elongate opening 28, which is the lower edge of the portion 48 of the vertical web remaining between the upper and lower openings, is positioned above any ceiling board 50 (see Figure 2) resting on the horizontal flange of the vertical web. Movement of the said portion 48 of the web away from the plane of the web, as shown in Figure -W 2, will not then cause the portion 48 of the web to press on the board 50 or dislodge the board from the runner 2.
As best seen in Figure 1, the enlarged bulb is thicker than the vertical web member and the lower edge 32 of the upper opening 26 has flared flanges 52 that are part of the enlarged bulb which is cut away to form the upper opening. As can be seen from the end of the structure of Figure 1, the web elements 6 and 10 form the vertical web 16. At the top of the vertical web, the web elements 6 and 10 flare out to form the bottom of the enlarged bulb 22. The lower edge of the upper opening 26 is so cut that the flared-out elements actually form part of the lower edge of the upper opening. The lower edge 32 of the upper opening 26 has a short straight line indentation or cut 46 at each end, with the straight line cuts or indentations 46 extending towards the lower opening 28. A cut or indentation 54 is placed in the lower edge of the upper opening below the notch 34 to weaken the metal at that point and to cause the flared edges 52 to be positioned adjacent each other at that point. There can be actual cuts 46 and 54 in the metal, but it is preferred that t,he metal at the flared edges 52 be indented, that is to say, the metal is not cut, but the flared edges are indented and pressed together to permit proper bending of the web portion 48 remaining between the openings 26 and 28 to absorb expansion of the runner metal.
However, the flared edges 52 are there to provide strength to the portion 48 when it is in its normal position providing support for a ceiling board.
When the expansion joint absorbs the expansion of the runner during a fire, the flanges 24 bend at the position of the notch 42 and move downwards as shown in Figure 2. Because of the cuts 44, the downward movement of the horizontal flanges 24 is not restrained by the stiffness of the web in that direction. Likewise, the loenlarged bulb 22 will bend upwards because of the existence of the notch 26 and this upward movement is not restrained because the cuts 36 permit the portion of the enlarged bulb between them to move upward. Because of the cuts or indents 46 and 54, the two 15pieces of metal forming the portion 48 will now expand outwardly from the plane of the web 16, usually with one piece of metal extending to one side of the web and the other piece of metal extending to the other side of the web as shown in Figure 2. Consequently, the 20expansion of the runner during a fire test is absorbed in the expanding expansion joint which is shown in its expanded state in Figure 2.
Claims (7)
1. An expansion runner for a ceiling system, comprising a vertical web member with upper and lower edge portions having an enlarged bulb at its upper edge portion and a horizontal flange extending from both sides of its lower edge portion; the runner having an upper elongate opening adjacent to the upper edge portion of the web and a lower elongate opening positioned in the vertical web between and intermediate to the upper and lower edge portions of the vertical web; the upper and lower openings having a length, taken along the length of the runner, selected to accommodate an expected axial expansion of the runner upon exposure to a fire; wherein the upper elongate opening extends from the upper edge portion of the web into the enlarged bulb, the upper elongate opening having upper and lower edges, the upper edge having only one triangular notch therein with the notch positioned at the midpoint of the upper edge and extending to almost the top of the enlarged bulb, and at each end of the upper edge a straight line cut with abutting edges that extends from the upper opening towards and to almost the top of the enlarged bulb; and the lower elongate opening having upper and lower margins, the upper margin being spaced from the lower edge of the upper elongate opening, the lower margin having only one triangular notch therein with the notch positioned at the midpoint of the lower margin and 1 extending to adjacent to the horizontal flange, and at each end of the lower margin a straight line cut with abutting edges extending from the lower opening towards and almost to the top of the horizontal flange.
2. An expansion runner as claimed in claim 1, wherein the lower edge of the upper opening has a short straight line indent at each end of the lower edge, the said indents extending towards the lower opening.
3. An expansion runner as claimed in claim 1 or loclaim 2, wherein a portion of the vertical web remains between the upper and lower openings, which portion of the vertical web is so positioned above the level of any ceiling board that may rest on the horizontal flange of the vertical web that movement of the said portion of the web away from the plane of the web will not cause the said portion of the web to press on or dislodge such a board from the runner.
4. An expansion runner as claimed in any one of claims 1 to 3, wherein the enlarged bulb is thicker 20than the vertical web member, and the lower edge of the opening has flared flanges that are a part of the enlarged bulb which is cut away to form the upper opening.
5. An expansion runner substantially as herein- 25before described with reference to, and as shown in, the accompanying drawings.
6. A suspended ceiling including at least one expansion runner as claimed in any one of claims 1 to 1 having ceiling boards supported on the horizontal flange on either side of the vertical web.
7. A suspended ceiling as claimed in claim 6, wherein the upper margin of the lower elongate opening is above the top surfaces of the adjacent ceiling boards.
1 Published 1989 at The Patent Office, State House, 66 71 High HoUnern. London WC;lR4TP. Further copies maybe obtained from The Patent OfficeSales Branch, St Mary Cray, Orpington, Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Kent, Con. 1/87
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/189,188 US4893444A (en) | 1988-05-02 | 1988-05-02 | Fire expansion joint for ceiling runner |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8909633D0 GB8909633D0 (en) | 1989-06-14 |
| GB2218129A true GB2218129A (en) | 1989-11-08 |
| GB2218129B GB2218129B (en) | 1992-01-02 |
Family
ID=22696301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8909633A Expired GB2218129B (en) | 1988-05-02 | 1989-04-27 | Fire expansion joint for ceiling runner |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4893444A (en) |
| CA (1) | CA1313582C (en) |
| GB (1) | GB2218129B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2704016A1 (en) * | 1993-03-04 | 1994-10-21 | Armstrong World Ind Inc | Ceiling rail with an expansion section. |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5349803A (en) * | 1993-06-07 | 1994-09-27 | Armstrong World Industries, Inc. | Lanced fire-rated runner |
| US6205732B1 (en) | 1999-05-19 | 2001-03-27 | Acoustic Ceiling Products, L.L.C. | Surface mounted grid system |
| US6536173B2 (en) | 1999-08-30 | 2003-03-25 | Acoustic Ceiling Products, L.L.C. | Covering for suspended ceiling grid system |
| US6305137B1 (en) | 1999-08-30 | 2001-10-23 | Acoustic Ceiling Products, L.L.C. | Covering for suspended ceiling grid system |
| US6351919B1 (en) | 2000-07-01 | 2002-03-05 | Worthington Armstrong Venture | Compression relief section |
| US6851238B2 (en) | 2002-03-14 | 2005-02-08 | Robert J. Rebman | Ceiling grid system and method of assembling the same |
| US6751922B1 (en) * | 2003-02-25 | 2004-06-22 | Worthington Armstrong Venture | Faceted radius grid |
| US7520095B2 (en) * | 2005-05-17 | 2009-04-21 | Worthington Armstrong Venture | Hook connector with plastic fire relief |
| USD829345S1 (en) * | 2016-11-14 | 2018-09-25 | Certainteed Ceilings Corporation | Support member for ceiling system |
| FR3108349B1 (en) | 2020-03-23 | 2022-03-25 | Saint Gobain Placo | Suspended ceiling rail with expansion absorbers |
| USD1009309S1 (en) * | 2020-04-21 | 2023-12-26 | Rockwool A/S | Grid tee for suspended ceiling |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1068380A (en) * | 1964-10-28 | 1967-05-10 | Donn Prod Inc | Structural beam |
| US3589089A (en) * | 1969-10-20 | 1971-06-29 | Eastern Prod Corp | Structural beam for ceiling suspension system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3175655A (en) * | 1962-02-16 | 1965-03-30 | Donn Prod Inc | Controlled expansion structural beam and grid structure including same |
| US3388519A (en) * | 1964-10-28 | 1968-06-18 | Donn Prod Inc | Controlled expansion structural beam and grid |
| US3807111A (en) * | 1972-04-04 | 1974-04-30 | Acoustical Ceiling Accessories | Fire-rated grid for a suspended tile ceiling and runners therefor |
| US3846031A (en) * | 1972-04-04 | 1974-11-05 | Rollform Inc | Ceiling grid system expansion joint |
| CA1013917A (en) * | 1975-11-18 | 1977-07-19 | Ceiling And Drywall Products Limited | Controlled expansion suspended ceiling grid member |
| US4606166A (en) * | 1985-05-13 | 1986-08-19 | National Rolling Mills Inc. | Fire-rated beam with expansion relief section |
| US4601153A (en) * | 1985-06-14 | 1986-07-22 | Chicago Metallic Corporation | Suspended ceiling system |
| US4685262A (en) * | 1985-10-17 | 1987-08-11 | Consolidated Systems, Inc. | Main beam for ceiling panel suspension system |
| US4785895A (en) * | 1988-03-10 | 1988-11-22 | Exxon Production Research Company | Drill bit with wear indicating feature |
-
1988
- 1988-05-02 US US07/189,188 patent/US4893444A/en not_active Expired - Fee Related
-
1989
- 1989-04-27 GB GB8909633A patent/GB2218129B/en not_active Expired
- 1989-05-01 CA CA000598372A patent/CA1313582C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1068380A (en) * | 1964-10-28 | 1967-05-10 | Donn Prod Inc | Structural beam |
| US3589089A (en) * | 1969-10-20 | 1971-06-29 | Eastern Prod Corp | Structural beam for ceiling suspension system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2704016A1 (en) * | 1993-03-04 | 1994-10-21 | Armstrong World Ind Inc | Ceiling rail with an expansion section. |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8909633D0 (en) | 1989-06-14 |
| GB2218129B (en) | 1992-01-02 |
| US4893444A (en) | 1990-01-16 |
| CA1313582C (en) | 1993-02-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930427 |